Descaling on Waxhaw water
Manufacturers write one descaling interval for the whole country, and it is set for hard water. Yours comes from Union County Water, and where that supply is soft the exchanger fouls considerably more slowly than that schedule assumes.
We will tell you honestly where you sit on that, because the alternative is descaling a unit annually that does not need it. Two caveats worth knowing before you skip it entirely: some manufacturers require documented annual servicing to keep the heat exchanger warranty valid, which is worth more than the service costs, and a property on a private well is a completely different conversation from one on the municipal supply.
- Descale on an interval that matches your actual water rather than the manual's default.
- Inlet filter clean, which is the most commonly skipped job and the cheapest.
- Flow rate and combustion check, so a declining unit is caught before it fails in January.
What Waxhaw itself changes
The housing in Waxhaw
Waxhaw is two things at once. 2,282 homes went up between 2000 and 2009 and are now firmly on their second water heater, while only 8.3% of the town was built in 2020 or later. Then there is the 93-building National Register district downtown, built between 1888 and 1940 with the railway running through the middle of it, where the plumbing is nothing like the subdivisions.
Where the heaters sit
Garage, closet and attic installs across the newer subdivisions. Tankless is unusually common here, because it was sold heavily across the Union County new-build belt, frequently alongside a recirculation loop. That pairing is worth checking, because a timer-driven loop on a unit not designed for one wears the heat exchanger.